Probing new physics in the era of precision cosmology

TL;DR

This paper explores how precision cosmological observations can be used to test and constrain new physics beyond the standard cosmological model, leveraging data from CMB, large-scale structure, and distant galaxies.

Contribution

It introduces methods to utilize cosmic observables for constraining theories beyond the standard $b5$-Cold Dark Matter model, advancing the use of precision data in fundamental physics.

Findings

Constraints on new physics models from CMB data

Identification of tensions in cosmological parameters

Enhanced understanding of the Universe's evolution

Abstract

Over the past decades, advancements in observational cosmology have introduced us in an era of precision cosmology, dramatically enhancing our understanding of the Universe's history as well as bringing new tensions to light. Observations of the Cosmic Microwave Background, large-scale structure, and distant galaxies have provided unprecedented insights into the processes that shaped our Universe. This PhD thesis contributes to this research by exploring how these cosmic observables can be leveraged to constrain new physics beyond the standard $\Lambda$-Cold Dark Matter model.